US1274070A - Carbureter. - Google Patents

Description

W. MORTON.

' CARBURETER.

APPLICATION FILED Aue.2o. 1915.

Patented July 30, 1918.

2 SHEETS-SHEET l.

'null/11111111111 W. MORTON.

CARBURHER.

APPLICATION man Ammo. ma.

` 1,274,070. Patenmmy 30,1915.

2 SHEETS-SHEET 2.

ii' '[2 33 :MI {0 l Z0 :Hunt-pull; i Il! 49 /iz @jig lo 4.3 '.mw 4

l L| V: Y? i i i 1? f5 |i Il i l1 il 116 .H V qql C) Q5" l `i` n 4Z g M 59 (5' Samurai wilmcmo m fw I attoznuf www morroy,

WALTER NORTON, 0F WINDSOR, ONTAYRIO, CANADA..

CABBUBETER.

speculation pf :mais Patent.

Patented July 3o, 191s.

Application iled August 20, 1915. Serial No. 46,408".

T o all 'whom it may concern Be it known that I, WALTER MoRToN, a'

subject of the King of England, residing at Windsor, in the county of Essex and Province of Ontario, Canada, have invented certain new and useful Improvements in Carbureters, of which the following is a specication, reference being had therein to the accompanying drawings.

This invention relates to carbureters of the type in which the proportionate admixture of air and fuel is automatically controlled by a member operated by ,engine inspiration, and its object is to prevent the vibratory movement of this member with each engine impulse and thus insure its even opening or closing as the speed of the engine increases or decreases, to admit the proper amount of air and prevent noise. A further object is to simplify and cheapen the construction of-carbureters of this type and to provide an arrangement of fuel inlet whereby the fuel is evenly and positively supplied l to the ingoing air, and said inlet may be easily and accurately adjusted or freed from any obstruction.

With these and other ends in view, the invention consists in the construction hereinafter more fully described and broadly set forth in the appended claims, reference being had to the accompanying drawings in whichj Figure 1 is a side elevation of a carbureter, embodying the invention withparts broken away to more clearly show the construction;

Fig. 2 is a longitudinal vertical section of the same; and l Fig. 3 isa sectional detail illustrating a locking device.

In the drawings, a preferred construction and arrangement of parts has been shown, but it will be understood that the parts may be given other forms or relative positions within the scope of the appended claims.

The carbureter illustrated in the accompanying drawings comprises a suitable body 10 forming a mixing chamber 11 therein which is contracted slightly toward its lower end and opens through the upper end ofA the body which is provided with apertured ears 12 by means of which it may be .attached to an intake manifold (not shown) of an in-V ternal combustion engine. A circular flange 13 on the body forms a cover for a bowl or fuel chamber'14 which is internally screwthreaded at its rim to engage a depending flange 15 on the cover, which flange is partially severed from the cover by a horizontal saw cut 16 and this portion cut in two vertically to form a spring portion 17 of the fiange adapted to be expanded within the rim of the cup to frictionally hold the cup against turning upon the body. The 'spring portion or finger 17 is sprung outwardly or expanded by means of a wedge block 18 eny gaged between the free end of the finger and the adjacent solid end of the flange and is carried by a screw-threadedtem or bolt 19 extending upward through an opening in the cover and provided with a suitable nut 2O on its upper end.

Formed integral with the bottom of the f cup or bowl 14 is an axial tubular portion 21 which extends upward therein, and 'on the body 10 is a depending tubular member 22 to extend downward within the fuel chamber of the cup and fit loosely over the tubular portion 21. tube 21 is contracted at '23 so that its internal diameter will correspond with the internal diameter of the contracted lower end of. the mixing chamber 11 and an annular in- The upper end of the ternal shoulder 24 on the lower end of the I body is provided to oppose the upper end of the tube 21, the external diameter of the contracted upper end 23 of the tube being slightly less than the internal diameter of the correspondingly formed portion of the bore of the depending tubular member 22, so that a' very narrow annular space or passage 25 is formed between the walls of the two tubes turning the cup up or down upon the flange 15 and locking it in adjusted position by means of the wedge block 18 as above de scribed. v

A float 27 within the fuel chamber is hinged at 28 to the body and controls the admission of gasolene to the chamber by means of a valve pin 29 in apassage 30 formed in the body and communicating through a valve seat 31 for the pin with a pipe 33 leads.

horizontal passage 32 in the body,- into which latter passage the end of a suitable supply The tubular member 21 of the cup forms with the mixing ,chamber an axial air passagethrough the carburetor, and said tube 21 is extended below the bottom of the cup and provided with air inlet openings 34. The lower end of the tube 21 is closed by a disk 35 engaging the end of the tube and formed with an axial upwardly extending guide sleeve 36 to receive the tubular stern 37 of an air control member 38 or head fixed on the upper end of the stem and of a double conicalvform with its largest diameter normally adjacent-V the contracted end of the tube 21 and annular fuel inlet 26. The contracted upper end of said tube 21 and contracted lower end of the mixing chamber form a contraction of the air passage through the carbureter with the fuel inlet opening into said passage at its most contracted point, and thepamage is further restricted by the'head 38 located within this contracted portion so that when the air controlling member or head is in normal position, a narrow space only remains between it and the narrow portion of the air passage through which the air may pass. IThis restriction of the air passage at the point where the fuel enters, gives a strong suction on the annular inlet 26 to draw the gasolene in and the ingoing air is always deiiected toward said inlet by the lower inverted conical surface of the head.

The stem 37 ofthe air control member is arranged to slide freely in its guide sleeve 36 and when said member is moved down- Ward as will be hereinafter described, the space around the head 38 'is increased.'V due to the contraction of the upper end of the lub 21 and the tapering upper end' of said ea v A cup or cylinder member 39 has a screwthreaded liange to engage the lower end of the tube 21 and is provided with an internal shoulder 40 forming a seat for the disk 35 so that the edge of said disk is engaged between the end of the tube and said shoulder and the disk securely seated and held upon the end of the tube to close the same. Secured upon the lower end of the tubular stem 37 of the air -control member is a piston 41 within -the cylinder 39 and a series of holes 42 in the Wall of the cylinder admits air thereto above the piston. A. spring-43 in the cylinder normally holds the piston up against the disks 35 and the air control head 38 in normal position within the contracted portion of the air passage. The interior of the cylinder below the piston is in communication with the mixing chamber 11 through the tubular stem 37 and thus upon inspiration of the engine to which the carbureter is attached, a partial vacuum will be formed'in the cylinder be- Levante low the piston and the air control member will be drawn down against the action of theI spring 43, increasing the area of the restrictionin the air passage around the head 38- 'and varying the proportion of air to that 70 without being directly moved by each engine impulse. Fluttering or vibration of said air control member is thus prevented 8o and the consequent noise and wear common to this type of carburetor is eliminated.

Surrounding the downwardly projecting endof the tube 21 is an air inlet, member 44 loosely held between the bottom of the 85 cup 14 and a flange 45 on the cylinder 39 so that the cup may be turned freely to adjust the fuel inlet 26 without turning said member which is formed with 'a tubular extension 46 at one side for the inlet of air there- 90 to or the attachment of an air inlet pipe (not shown). A choker valve 47 of the usual form is provided in the extension 46 to shut ofi' the supply of air and increase the vacuum in the mixing chamber to cause a 95 greater suction on the fuel inlet in starting, and a throttle valve 48 of the usual form is provided in the outlet end of the mixing chamber.

By this construction a strong mixture is secured for starting the engine and at low speeds due to the arrangement of the annular fuel inlet relative to the air control member, anda quietly operating device giving an even gradual increase in the supply of air as the speed increases, is secured. The arrangement of parts also gives a ready and accurate adjustment of the fuel inlet by the turning of the cup 14 relative to the bodyh/ said cup being preferably provided with 110 markings or graduations 49 to aid in such adjustment. Should the fuel inlet 26 become clogged, it may be readily cleaned by turning the cup and the carbureter is readily. assembled or taken apart by unscrewing the member 39 which serves to hold the parts .in place. The annular inlet 26 admitsJ the gasolene in a thin ilm all around the air passage, thus insuring an even mixture as it p has a greater diameter than the stream of ingoing air and is projected inwardly across said stream, and the air is deflected by the lower side of the head 38 toward the inlet, and other advantages are due to the construction and arrangement of parts. v

Having thus fully described my invention what I claim is.

1. In a. carbureter, the combination of an air passage having an annular fuel inlet, a fuel chamber concentric. with said air pas- 130 Sage and communicatin 'with said annular inlet, and a member wit in said aieassagg opposite said fuel inlet and a'dap to moved by engine inspiration in a direction opposite to the flow of the ingoing air in said air passage.

2. In .a canbureter, the combination of a body formed with an air lpassage extending therethrough having a Venturi restriction intermediate its' ends and an annular fuel inlet in the wall'of said passage completely encircling said passage at the restricted portion thereof,`a f-uel chamber 0n the body communicating with sa'd annular fuel inlet, an air regulating member in ysaid passage opposite said fuel inlet, land means for causing said regulating member to ybe moved longitudinally of the passage by engine in- V spiration in adirectionopposite to the flow of the ingoin air.

3. In a car ureter, the'combination ofa body having ,an air passage extending therethrough, the wall of said passage being formed by relatively adjustable members one ofwhich has an annular shoulder opposed by the end of the other member to orm a continuous annular opening in the side of said `passage for the admission of fuel thereto, means for relatively adjusting said members to vary said opening, a fuel chamber surrounding said passage-for supplying fuel to said annular opening, and an air regulating member in the yairis of the air passage movable vlongitudinally thereof and having a head adjacent the fuel opening and spaced from the wall of'said passa with an air passage through the head and a closed chamber communicating with the passage.

4. In a carbureter, the combination of a' `body lhaving an air passage therethrough `which is contracted intermediate its ends,

the wall of said passage begg provided with a. fuel inlet at the contrae, portion thereof, an air regulating member extending upwardly in .said paage from the inlet end thereof and having a head of double conical form adjacent the contracted portion of the passage with the tapered upper end of said head extendingin the direction of the flow, means for causing a movement of said member longitudinally from said contraction in a direction opposite to the flow of the ingoing-V air upon engine inspiration, and means for supplying fuel to the fuel inlet.-

5. In. a c'arbureter, the`cori1bination of 'a body having an air paage .therethrou h j which is contracted intermedi-alte its en s,

an air regulating member in the contracted portion of said paage spaced therefrom 'and having -an air passage therethrough,

means for supplying fuel' tothe contracted portion ofsaid passage, avacuum amber at one side of said member commu eating with the outlet side of said air passage through said air passage in said member,

and means ada by partial vacuum in said chamber or moving the regulating member out of the lcontracted portion of said' wall of saidp'assage adjacent the fuel inlet,

a cylinder, a piston in said cylindera tubu- .lar stem .connecting .the piston and. member and through which stem the cylinder communicates with the paage at the outlet side of the contracted portion thereof, and means for moving said member in a direction opposite to that in which it is moved by the piston. f

7. lIn a carbureter, the combination of a body forming a mixing chamber, a cup member forming a fuel chamber concentric with said mixing chamber, and an axial tubular member in the'cup coperating with the mixing chamber to form an air passage through the carbureter and with its end adjacent the bod at the lower end of the lmixing chamber to fiirm an annular fuel inlet from the fuel chamber into the air passage, said bod and cup member being relatively adjusta le to vary the fuel inlet..

8. In a carbureter, the combination of a body forming a mixing chamber, a cup inember having screw-threaded engagement with` the body, an axial tubular member in the` the mixing chamber an air passage throughl the carburetor, the wall ofsaid air passage havinganannular fuel inletadapted to be adjusted to regulate the flow by adjusting the cup member relative to the body, and means for locking the cup in the position to which it is adjusted.

10. In a carbureter, the combinationof a body forming a mixing chamber, a cup member detachably secured to the body and provided. with an'axial tubular member forming together with the mixing chamber a passage through the carbureter, the .upper end of said'tubular member being 1n opposed relation to the body to form an annular fuel inlet for said passage, a depending tubular member on the'body sleeved over said axial tubular member with n. narrow space between seid members forming e fuel passage leading to the 'fuel inlet, vseid body and cup being adept-ed to be adjusted rele.- tively to very the fuel inlet, und means for securing the body and cup in the relative position to which they are adjusted.

l1. ln a. carburetor, the combination of a body forming s, mining chamber, a oup membei' on the body provided with an axial tubular member 'forming together with the mixing chamber e, passage through the enrbureter, the upper end of seid tubular inember being in opposed relation to the body to form an annuler fuel inlet for said passage .und seid body and @up being adjustable relatively to very said inlet, a screwthreeded flange on the body to engage the cup, seid delige being severed :from the body through e. portion of its length to form o. yielding;1 enpansible portion, and e wedge operable to expend seid yielding portion of seid flange within the oup und hold the cup and body against turning relatively.

l2. A carburetor eomprisingl e uel reservoir having en integrally-formed hollow upf,

werdly-entending nozzle through which nii' to be esrbureted may poss, and o cover hoving en opening and en integn'elly-ormed depending sleeve surrounding seid opening end adepte-d to telesoone over seid .nozzle to :form en ennulnr spese through which the fuel from the reservoir moy pass, the seid Lomme sleeve having en interiorly-forined shoulder constituting e valve sont with which the eX- tremity of the nozzle coperaties to eontiol the supply of fuel from said annular space to the space above the nozzle, and said cover having a threaded connection with the reservoir serving as adjusting means .for reguloting the vdistance between the extremity of the nozzle and said seat.

13. A carburetor comprising a, iuel'reservoir having on integrallyormed hollow upwurdly extending nozzle through which air to be carbureted may pass, und a cover having an opening und on integrally-fortified depending sleeve surrounding said opening und adapted to telescope over said nozzle to form an annular space through which the fuel from the reservoir may pass, the said sleeve having un interiorly-orlned shoulder constituting a. valve seat with which the extremity of the nozzle cooperates to Control the supply of fuel from said annular space tothe space above the nozzle, and means whereby seid reservoir may be raised and lowered with respect to the cover to regulate the distance between the extremity of 'the nozzle and said sont.

in testimony whereof l :15X my signature presence oi 'two witnesses.

WALTER MRTON.

Witnesses: Lewis E. FLANDEns, ANNA M. Donn.

Images